Sensibilidade de conjuntos de nuvens a varia??es de parametros microfísicos: parte II - influência da concentra??o de gotículas

摘要

This article is the second of a series of four articles with aims in investigate the sensitivity of convective cloud systems to microphysical parameters. The tool used in this study is a cloud ensemble version of the Regional Atmospheric Modeling System (RAMS), as described in Part I. In Part II, the focus is on the influence of droplet concentrations, with the cloud ensemble model being configured with values that are typical of clean or polluted environments. Emphasis was given to the impact of those droplet concentration variations on the water partition among the different hydrometeor types, precipitation development and surface radiative budget. It was verified that the role played by droplet concentration changes over these variables might be somewhat dependent on the large-scale regime ("active", with generalized deep convection or "suppressed", with inhibition of deep clouds and dominance of shallower and less organized convection).